Flora of North America species comparison

coarse, 1.5–2.8 mm thick, typically with long, unbranched segments from which shoots arise singly every few nodes.

10–90(–135) cm.

sharply trigonous, (10–)20–80 cm, scabrous-angled distally.

3–6 per culm;

sheaths tight, inner band hyaline, 1.8–2.5 cm, apex concave, glabrous;

ligules 0.6–2.5(–4.5) mm, rounded to ± acute;

blades plicate, 5–40 cm × 0.7–3.3(–3.8) mm, widest leaf 1–3.3(–3.8) mm wide.

basal sheaths dark brown;

sheaths with hyaline inner band, apex prolonged 0.3–1.6 mm beyond base of blade, glabrous;

ligules 0.6–2.7 mm;

blades 1–3.7 mm wide.

0.7–7.8 cm;

spikes (2–)3–8;

lateral spikes pistillate often with few staminate flowers proximally, 3–15.5 mm, sessile, staminate portion 7-flowered, to 8.2 mm, pistillate portion 3–32-flowered, 2.5–11 mm;

basal 2 spikes 1.7–42 mm apart;

terminal spike gynecandrous, 5–24 mm, staminate portion 2–17-flowered, 2–16.5 × 0.9–2 mm, pistillate portion 4–26-flowered, 2.6–9 × 4.9–9.1 mm.

dense to elongate, 1–3 cm;

spikes 4–12(–18), usually unisexual; staminate spikes lanceoloid; pistillate spikes ovoid.

spreading to reflexed, castaneous to dark brown, 2–14-veined abaxially, 0–12-veined adaxially over achene, lanceolate to ovate, (2.65–)2.9–4.75 × 0.8–2.1 mm, (1.7–)1.8–3.2(–3.6) times as long as wide;

beak (0.85–)0.95–2 mm, (0.4–)0.45–0.86 length of body, serrulate, teeth (0–)0.15–0.5 mm.

dark reddish brown, essentially veinless, stipitate, broadly ovate to rhombic-orbicular, thickly plano-convex, 1.8–2.8 × 1.1–1.7 mm, shiny;

beak 0.25–0.5 mm, hyaline, oblique or obscurely bidentulate.

ovate-lanceolate to rhombic-ovate, 1.3–2.1 × 0.8–1.55 mm.

scales ovate, (1.4–)2.1–3.1 × 0.7–2.3 mm, apex acute to sometimes obtuse.

scales reddish brown to dark brown, with narrow hyaline margins, ovate, apex acute to acuminate-awned, shiny.

scales ovate-lanceolate to ovate, 1.3–3.8 × 0.8–1.7 mm, base clavate, apex acute.

0.8–1.6(–2) mm.

1.8–3.1 mm, apiculus smooth to warty (30X).

= 58.